SPYDER更新后打不开：UnicodeDecodeError: ‘utf-8‘ codec can‘t decode byte 0xb5 in position 134

一、问题描述

spyder提示更新3.4.1版本，手贱跑去更新了一下，更新完之后spyder蛛网加载完后就闪退，开始查资料解决。

二、解决方法

首先打开anaconda终端，输入spyder回车查询错误信息：

(base) C:\Users\DELL>spyder
fromIccProfile: failed minimal tag size sanity
F:\anaconda\lib\site-packages\paramiko\transport.py:220: CryptographyDeprecationWarning: Blowfish has been deprecated
  "class": algorithms.Blowfish,
Traceback (most recent call last):
  File "F:\anaconda\Scripts\spyder-script.py", line 10, in 
    sys.exit(main())
  File "F:\anaconda\lib\site-packages\spyder\app\start.py", line 252, in main
    mainwindow.main(options, args)
  File "F:\anaconda\lib\site-packages\spyder\app\mainwindow.py", line 1822, in main
    mainwindow = create_window(MainWindow, app, splash, options, args)
  File "F:\anaconda\lib\site-packages\spyder\app\utils.py", line 289, in create_window
    main.setup()
  File "F:\anaconda\lib\site-packages\spyder\app\mainwindow.py", line 773, in setup
    PLUGIN_REGISTRY.register_plugin(self, PluginClass,
  File "F:\anaconda\lib\site-packages\spyder\api\plugin_registration\registry.py", line 342, in register_plugin
    instance = self._instantiate_spyder5_plugin(
  File "F:\anaconda\lib\site-packages\spyder\api\plugin_registration\registry.py", line 184, in _instantiate_spyder5_plugin
    plugin_instance = PluginClass(main_window, configuration=CONF)
  File "F:\anaconda\lib\site-packages\spyder\api\plugins\new_api.py", line 331, in __init__
    container.setup()
  File "F:\anaconda\lib\site-packages\spyder\plugins\pythonpath\container.py", line 55, in setup
    self._load_pythonpath()
  File "F:\anaconda\lib\site-packages\spyder\plugins\pythonpath\container.py", line 136, in _load_pythonpath
    system_path = get_system_pythonpath()
  File "F:\anaconda\lib\site-packages\spyder\plugins\pythonpath\utils.py", line 31, in get_system_pythonpath
    env = get_user_env()
  File "F:\anaconda\lib\site-packages\spyder\utils\environ.py", line 71, in get_user_env
    env_dict = get_user_environment_variables()
  File "F:\anaconda\lib\site-packages\spyder\utils\environ.py", line 60, in get_user_environment_variables
    res = stdout.decode().strip().split(os.linesep)
UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb5 in position 134: invalid start byte

这里显示的是编码错误，最重要的是找到文件记录里面的最后一个文件environ.py，然后找到对应的第60行：

res = stdout.decode().strip().split(os.linesep)

environ.py文件开头已经有# -*- coding: utf-8 -*-，所以多半是中文编码问题，在这句代码的decode（）的括号中加上'gbk'，：

res = stdout.decode('gbk').strip().split(os.linesep)

重启spyder，发现成功运行。不过我之前reset过spyder的设置，不知道是否必要，如果不成功可以在anaconda终端试试：

(base) C:\Users\DELL>spyder --reset

三、结论

我记得我上次更新spyder也出现问题，还是重装环境解决的，这次又没记住教训，以后能不更新就不更新吧，遇到UnicodeDecodeError：'utf-8' ……多半和中文编码有关系，看看哪里有中文路径或者需要加一个decode('gbk'）啥的吧。

其他类似问题及解决方法：

(12条消息) Spyder闪退、启动失败的解决办法。UnicodeDecodeError: ‘gbk‘ codec can‘t decode byte 0xa9 in position 226······-CSDN博客

(12条消息) spyder调试遇到错误UnicodeDecodeError: 'utf-8' codec can't decode byte 0xca in position 218: 解决办法_spyder unicodedecodeerror: 'utf-8' codec can't dec_ARM小妖的博客-CSDN博客